Oppo Colombian chocolate and hazelnut, Waitrose, £4.99, 475ml. This is made with the sweetener erythritol, which is less likely to cause digestive problems than most others, and contains no added fibre. Stevia, a natural sweetener, is also added. Although the hazelnut flavour is a bit overpowering, I¿d probably give this one some freezer room. SCORE: 4/5